How to evaluate codebase

I person built a bespoke CRM for a client. It was his thought and he has paid for it successful full. In nan connection I wrote that I clasp nan authorities to nan codebase. He now wishes to discuss buying nan authorities truthful that if he ever wants to return it to different developer he tin do.

Firstly, really could I spell astir pricing it successful a measurement that is some adjacent and reasonable? (There are still updates/changes being made which are being charged per hour.)

Secondly, was this nan correct point to do successful nan first place? He mentioned that not giving nan customer power is very dated, and that it is each astir elasticity and allowing nan customer to time off whenever they want. Is this correct? In early should I ever springiness nan customer nan authorities from nan start?